Ref your thread elsewhere, do a google for Caltrops
Easy made and very effective, I've seen em made from bits of barbed wire.
Thanks NR, didn't know they were called that.
If I recall correctly the IRA used to use them made from 6" nails??
They are the land mine of ancient times, used for area denial and funneling attacking forces into kill zones...still have there uses today, floor boards with nail knocked through are a good improvisation that will slow people up in the dark or close country.
Yes Midnitemo....slowed me up alright....never knew they existed, or had a name for them .....thought I invented something special.....bugger!
Thanks for the tip NR. Some of those things look downright nasty!